Re: [libvirt] [PATCH v2] libvirt support to force convergence of live guest migration

Hello, 'am sending this updated patch as an attachment (as I was having some issues with my smtp server and git send-email setup). Thanks, Vinod Subject: [PATCH v2] libvirt support to force convergence of live guest migration Changes since RFC (i.e. v1) patch : - Incorporated feedback from Jiri Denemark

Busy enterprise workloads hosted on large sized VM's tend to dirty memory faster than the transfer rate achieved via live guest migration. Despite some good recent improvements (& using dedicated 10Gig NICs between hosts) the live migration may NOT converge. Recently support was added in qemu (version 1.6) to allow a user to choose if they wish to force convergence of their migration via a new migration capability : "auto-converge". This feature allows for qemu to auto-detect lack of convergence and trigger a throttle-down of the VCPUs. This patch includes the libvirt support needed to trigger this feature. (Testing is in progress) Signed-off-by: Chegu Vinod <chegu_vinod(a)hp.com&gt; --- include/libvirt/libvirt.h.in | 1 + src/qemu/qemu_migration.c | 40 ++++++++++++++++++++++++++++++++++++++++ src/qemu/qemu_migration.h | 3 ++- src/qemu/qemu_monitor.c | 2 +- src/qemu/qemu_monitor.h | 1 + tools/virsh-domain.c | 7 +++++++